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New SkyWave almost ready to fire up...
Fired up the new SkyWave 2879ABTC with the temperature compensated bias
tonight. It worked like a million bucks. I adjusted (using the available final-tweak resistor pads. You might see it sticking up in the air in the picture) the AB bias current for 500mA at room temperature. I transmitted and ran the sink up to 80 degrees C and the bias was 530mA. I ran out of time and was unable to test it cold... but I believe the circuit will work as the first proto. Here's a picture of the amp on the bench in testing. http://www.telstar-electronics.com/img_0001.jpg |
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